Talking-machine reproducer



Mar. 27, 1923.

' 1,449,616. 1- McQUINN.

TALKING MACHINE REPRODUCER. FILED DEC. 6. 1918.

Patented Mar. 27, 1923.

warren sraras JAMES MOQUINN,

or LIVERPOOL, ENGLAND.

TALKING-MACHINE REPRODUCER.

Application filed December 6, 1918. Serial No. 265,626.

T 0 all whom it may concern Be it known that 1, James MOQUINN, a subject of the King of Great Britain, and a resident of VVavertree, Liverpool, England, have invented certain new and useful Improvements in Talking-Machine Reproducers, of which the following is a specification.

This invention relates to improvements in reproducers for talking machines whereby a more satisfactory and eflicient volume and control of tone may be obtained.

According to this lnvention the needle bracket of the sound box or reproducer is supported by means of preferably flat section springs each of which maybe readily detachable, the springs being connected to lugs or brackets on the sound box and to the needle socket of the stylus bar so that the springs form the vibratory axis of the stylus bar. Further improvements relate to the method of connecting the sound box to the end of the tone arm and the end of the stylus bar to the diaphragm of the sound box. The invention also comprises a new construction of the material of the diaphragm itself.

The invention as far as the construction of the sound box is concerned is illustrated in the accompanying drawings, in which Fig. 1. is a side 'view partly in section, Fig. 2. is a face view, and Fig. 3. an end view of the sound box, Fig. 4: being a detail view of the preferred manner of connecting the needle bracket to the diaphragm of the reproducer.

In carrying out the invention, instead of controlling the vibration of the needle bracket by means of a coiled spring, the needle socket 21 is connected to lugs 24 on the rim of the sound box 9 by means of two light springs 25, preferably flat in cross section, the outer ends of each spring being erforated to receive screws by means 0 which the springs are detachably connected to the lugs 24. Similarly, the inner ends of the flat springs 25 are perforated to receive other screws which connect the springs to the needle socket 21. Each spring is thus readily detachable for repair or renewal. The needle socket 21 is fitted with the usual arm 22 connected to the diaphragm 23. The springs 25 thus form the pivot about'which any slight rattle or ar the stylus bar vibrates and with such a stiff but resilient support it is found that a larger and purer volume of tone is obtained than with other existing arrangements, while by making the springs readily detachable in the way described stiffer or more flexible springs may bar to produce any desired resilience and the value of the tone emitted consequently modified.

The reproducer 9 is detachably connected to the tone arm 8 by forming a flange 31 on the tone arm and fitting the neck tube 32 of the reproducer with a rubber disc 30, the bore of such rubber disc fitting closely round the tube 32'at the rear of the sole plate 33 of the sound box, and such hard against the face of the rubber disc 30 which latter when the reproducer is home in the neck 8 of the tone arm beds against the flange 31. Such a cushion 30 prevents liable to arise if a metal contact were made between the sole plate 33 and the flange 31. The preferred manner of connecting the arm 22 to the diaphragm 23 consists in forking the end of the arm Fig. 4f, the feet of the forks terminating in a plate 35 which sits on the diaphragm 23, a. small disc 36 being provided on the under side of the diaprhagm, and a screw 37 pass-- ing through the disc 36 being threaded into 85 the foot plate 35.

The reproducer be improved in tone by forming the diaphragm 23 of a cardboard or other fibrous or the like disc, which is steeped in hot glue until parchment like consistency, after which it is dried under pressure to ensure it becoming quite flat, the treated disc being subsequently immersed in formalin to'harden it and render the glue insoluble.

The disc of the reproducer when made in this way may be reinforced by several radially disposed resilient metallic webs.

I claim.

1. In a talking machine rep'roducer, a .10

stylus bar having a divided end, with the parts thereof lying in a plane parallel tothe longitudinal axis of the stylus bar, a diaphragm, and means for connecting the divided end of the stylus bar to thesaid 1 di r gminane v be fitted to the stylus 6o sole plate fitting which would be 22 as shown at it assumes a 2. In a talking machine reprodueer, a In testimony whereof I affix my signature stylus her having a forked end, the parts in presence of two Witnesses. of which lie in a plane parallel to the longi- T1 T T tudinal axis of the stylus bar, a plate asso- JAMJLS MCQUIBL' 5 ciated with the forked end of-the stylus bar, lVitnesses:

a diaphragm, and means for connecting the A. J. DAVIES,

said plate to the diaphragm. D. RUSSELL. 

